September 2017

The music of Les Mills Body Pump, with Spotify data

September 30, 2017 | 0 Comments

I am a runner but also a Body Pump enthusiast. Body Pump is a group fitness class of the Les Mills company, in which you train different muscle groups using a weighted bar – whose total weight you modulate with plates in order to adapt it to your fit... [Read more...]

Identify & Analyze Web Site Tech Stacks With rappalyzer

September 30, 2017 | 0 Comments

Modern websites are complex beasts. They house photo galleries, interactive visualizations, web fonts, analytics code and other diverse types of content. Despite the potential for diversity, many web sites share similar “tech stacks” — the components that come together to make them what they are. These stacks consist of web servers (...
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Data.Table by Example – Part 3

September 30, 2017 | 0 Comments

For this final post, I will cover some advanced topics and discuss how to use data tables within user generated functions. Once again, let’s use the Chicago crime data. Let’s start by subseting the data. The following code takes the first 50000 rows within the dat dataset, selects four ...
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tidytext 0.1.4

September 29, 2017 | 0 Comments

I am pleased to announce that tidytext 0.1.4 is now on CRAN! This release of our package for text mining using tidy data principles has an excellent collection of delightfulness in it. First off, all the important functions in tidytext now support supp...
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Going, going, … 2

September 29, 2017 | 0 Comments

Em vários posts este mês, destaquei um novo versão do curso de estatística que oferecemos em São Paulo sobre estatística. É um curso inicial que usa R como a ferramenta chave para ensinar a montagem de análises quantitativas importantes nas … Continue reading → [Read more...]

Hold the Phones . . . Stanton’s Alive Again

September 29, 2017 | 0 Comments

Sometimes, events move faster than we predict them. This is one of the things that makes  statistics as much of an art as a science. Last night, Giancarlo Stanton hit not 1 but 2 home runs. He is now tied … Continue reading →
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Convert hand-drawn equations to LaTeX with the mathpix package

September 29, 2017 | 0 Comments

Statistics involves a lot of mathematics, so one of the nice things about report-generation systems for R like Rmarkdown is that it makes it easy to include nicely-formatted equations by using the LaTeX syntax. So, if we want to include the density function of the Guassian Normal distribution: $$ \frac{1}{{\sigma \... [Read more...]

bupaR: Business Process Analysis with R

September 29, 2017 | 0 Comments

Organizations are nowadays storing huge amounts of data related to various business processes. Process mining provides different methods and techniques to analyze and improve these processes. This allows companies to gain a competitive advantage. Process mining initiated with the discovery … Continue reading → [Read more...]

Multicollinearity in R

September 29, 2017 | 0 Comments

One of the assumptions of Classical Linear Regression Model is that there is no exact collinearity between the explanatory variables. If the explanatory variables are perfectly correlated, you will face with these problems: Parameters of the model become indeterminate Standard errors of the estimates become infinitely large However, the case ...
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New Package GetITRData

September 29, 2017 | 0 Comments

Downloading Quarterly Financial Reports from Bovespa - Financial statements of companies traded at B3 (formerly Bovespa), the Brazilian stock exchange, are available in its website. Accessing the data for a single company is strai... [Read more...]

Rcpp 0.12.13: Updated vignettes, and more

September 28, 2017 | 0 Comments

The thirteenth release in the 0.12.* series of Rcpp landed on CRAN this morning, following a little delay because Uwe Ligges was traveling and whatnot. We had announced its availability to the mailing list late last week. As usual, a rather substanti... [Read more...]

ggflags

September 28, 2017 | 0 Comments

A package for plotting country flags as bubbles or balloons in ggplot. [Read more...]

August 2017 New Package Picks

September 28, 2017 | 0 Comments

August was a relatively slow month for new R packages; “only” 180 new packages stuck to CRAN. Here are my “Top 40” picks organized into seven categories: Data, Machine Learning, Miscellaneous, Science, Statistics, Utilities and Visualizations. Although they have been written for specialized audiences, I have included the three “Science” packages because, ...
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Going, Going . . . 1

September 28, 2017 | 0 Comments

Two posts today with similar themes. Time is running out.  First, time is running out for Giancarlo Stanton. His bat has been very silent this week so far. The Marlins have 7 more games and he still needs 4 dingers … Continue reading → [Read more...]
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